Diabolo-bobbin.



No. 892,951. PATENTED JULY '7', 1908.

'1). D. FIELD.

DIABOLO BOBBIN.

APPLIOATION FILED DBO. 2, 1907.

UNITED STATES PATENT OFFICE.

DAVID 1). FIELD. or NEW YORK, N. Y., ASSIGNOR TO EDGAR A. WILHELMI, OF sUMMiT, NEW

' JERSEY.

DIABOLO-BOBBIN.

Specification of Letters Patent.

Patented July 7, 1908.

Application filed December 2, 1907. Serial No. 404,748.

T all whom it may concern:

' Be it known that I, DAVID D. FIELD, a citizen of the United States, 'residin at New York city, in the county of New ork and State of New York, have invented certain new and useful Improvements in s bo Diabolo-Bobbins, of which the following is a full, clear, and exact descri tion.

. My invention relates to a orm of bobbin or spinning element for use with the game known as diabolo, in which the bobbin or ob'ect is spun rapidly on its axis by a cord looped between two rods or handles and manipulated thereby. In the practice of this game it is necessary to attain a rapid spinmng movement of the top or bo bin to reserve it in a fixed lane of rotation. uccessin the game is t erefore largely dependent on the skill of the operator in acquirin and maintaining this rapid rotation of t e bobbin. So far as I am aware, this rotation has never been utilized for any other useful purpose than maintaining the bobbin in a 1ve n plane.

By the present invention I have organized certain humming devices or whistles into the construction of the bobbin, so that it buzzes or whistles loudl in use, and in ro ortion to its speed 0 rotation. This is ound in practice to be very advantageous not on y on account of the musical value of the sound roduced', but also on account of the fact t f at it rovides an additional ground of competition between the contestants, who may each strive to make the noisiest buzz or whistle with their instrument. For this purpose I have incorporated hummers or whistles of a certain construction in the diabolo bobbin so'as to respond to a moderate s eed of rotation therein, and further in sue a way thatthe correct balance of the device will not be disturbed.-

In the drawings: Figure 1 is a side view partly in section of a diabolo bobbinv emdymg the (principles of my invention;

'Refe i to the drawings in which like parts are esignated by the same reference 1 indicates the core or body 'of the bbin, and which is of the usual form,

' havingajdouble conical outline with a very narrow waist 01' middle ortion 2. 4

- '3 designate broadly t e horns,hummers forations 14. If desired, a rubber rin v view of the same; Fig. 3 is a. section on the line IIIIII of Fig. 1.

or whistles, of which two are provided, and which are identical in construction in all res ects. In the preferred form I provide a sha low sheet metal cup or stamping 4, of

'slightly less outside diameter than the end of the diabolo bobbin 1. This on or stamping is secured coaxially u on sai end of the bobbin by any suitab e. screws or fastening devices 5. 6 designates a plate or disk also of sheet metal and adapted to be crimped or fastened across the open front face of the cup or stamping 4. At its middle the disk 6 has an inwardly embossed portion 7, perforated with one or more openings 8. i

9 designates a ring snugly fitting against the disk 6 around the inwardly embossed portion 7 thereof. This ring carries what I term the reed plate 10, and which is formed with a plurality of elongated slots 11, having ordlnar vibrating reeds 12, projecting longitudina ly thereover. These reeds are fastened at one end toithe reed'plate and vibrate toward and from the slots in the ordinary way, which is well understood and need not be particularly described.

Within the cavity of the cu or stamping 4,

there area lurality of Na cs 13, convenientl forme of sheet metal, soldered or fastene in planes radiating from the axis of the device. The outer periphery of the cup or stampin 4 has a series of perforations 14, located t ereabout, and it is evident that the blades 13 act as vanes of a centrifugal fan in use and impel a current of air continuously from the o enin s 8, through the reed mechanism, an radia ly outwar through the per- 15 ma bemounted at each end of the bo bin an surrounding the on or stamping 4 so as to protect the same. n this case the ring has radial o enin s or passageslfi, 1n alinement with t e ho es 14 of the cup or stamping 4. This construction is particularly advantageous since the holes in the rubber ring 15 act quite owerfully as impellmg means for the air, t us assisting the action of the blades 13.

When the bobbin, constructed as above described, is skilfully operated by the cord of a diabolo apparatus, it spins with increasing ra idity, and quite soon a point is reache where it emits a humming or whistling sound by the action of its reeds. The

more rapid the rotation becomes, the louder becomes the hum or Whistle, thus constituting an accurate and rather pleasing indication of the success which the operator has attained in the s inning operation. Not only does the whist e have th1s function, but

it has the further and very important purtated, vanes in said cavities, and end plates whistles and having radial holes covering said cavities and having reed hummers associated therewith to operate when air is sucked inwardly through said end plates at more than a' predetermined veocity, whereby said hummers operate when the bobbin attains a certain speed of rota tion, due to the combined suction of said vanes and the said action of said 0 enin s.

2. .In combination with a diabo 0 b0 bin, a pair of hummers or Whistles secured symmetrically to the ends of the bobbin, and having perforations and blades to impel air therethrough by centrifugal action, and rubber rings surrounding said hummers or in alinement with said perforations. 4

In witness whereof, I subscribe my signature, in the presence of two witnesses. a DAVID D. FIELD. Witnesses:

FRANK S. OBER, WALDO M.'OHAPIN. 

